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Transformers
Transformers
Ereva Transformers & Switchgear is a manufacturer and trader of supreme quality potential transformers.
- Designed to present a negligible load to the supply being measured and having an accurate current ratio and phase relationship to enable accurate secondary connected metering
- Constructed by passing a single primary turn (either an insulated cable or an uninsulated bus bar) through a well-insulated toroidal core wrapped with many turns of wire
- This affords easy implementation, using the pass-through conductor as a single turn primary.
- Direct measurement of voltage in high voltage system is not possible because of insulation problem of measuring instruments; it is also not possible to use direct voltage for the system protection purpose due to its high value and high insulation problem protective relays.
- Therefore voltage transformers are used to step-down the high system voltage to low standard value accurately in proportion to their ratio.
- Easy implementation on high voltage bushings; secondary turn core; long operational life.